http://msdn.microsoft.com/zh-cn/library/bb907626.aspx

再结合如下：

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)

{

//编辑按扭

if (e.CommandName == "Edit")

{

//设置编辑行高亮显示

this.GridView1.EditRowStyle.BackColor = Color.FromName("#F7CE90");

//string index= this.GridView1.DataKeys[Convert.ToInt32(e.CommandArgument)].Value.ToString();

int index = Convert.ToInt32(e.CommandArgument);

GridViewRow row = GridView1.Rows[index];

string xh3 = row.Cells[3].Text;

}